while 0

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Advanced macro techniques for C language

Special Symbol #, # #(1) # When you put a # Before of argument in a preprocessor macro, the preprocessor turns that argument into a character array.Using a # in front of a parameter in a macro, the preprocessor converts this argument to an array of

Linux Source Analysis byte order (3)--Big_endian.h

This section mainly analyzes the endian byte order.First, we need to understand the concept of big-endian and small-end:Byte order refers to the order in memory of data that occupies more than one byte of memory, usually with a small, big-endian

__FILE__,__LINE__,FUNCTION__ implementation of code-tracking Debugging (Linux C language programming)

[Email protected]:~/cpropram/2# cat global.h//header file#ifndef Clobal_h#define Global_h#include int Funca (void);int funcb (void);#endif[Email protected]:~/cpropram/2# cat funca.c//function A#include "global.h"int Funca (void){printf ("This is

FILE__,__LINE__,FUNCTION__ implementation Code tracking (reprint)

root@xuanfei-desktop:~/cpropram/2# cat global.h//header file#ifndef Clobal_h#define Global_h#include int Funca (void);int funcb (void);#endifroot@xuanfei-desktop:~/cpropram/2# cat FUNCA.C//function A#include "global.h"int Funca (void){printf ("This

Likely, unlikely macro and built-in GCC functions _ builtin_expect ()

A few timesI recently read the Linux 2.6 kernel. Although I have read a lot of related knowledge before, but I have read it three or three times, I still feel very hard to read the 2.6 kernel. In the face of such a huge kernel of 2.6, the confidence

Copy_from_user & copy_to_user

Many interesting functions will be encountered in kernel learning, and many related functions can be pulled along a function. Copy_to_user and copy_from_user are two functions that are frequently encountered during Driver-related program design.

Scheduler, minimal resources microcontroller is worth a use

Source: again out of a scheduler, small resources microcontroller is worth a useSelf-thought has the following characteristics:1) Super portability, CPU-independent, almost any CPU that supports C programming can be used! (This article only takes 51

Process control and implementation methods in PHP speech

: This article mainly introduces the process control and implementation methods in PHP speech. if you are interested in PHP tutorials, please refer to them. A script is composed of statements. statements are implemented by flow control. This section

The use of macros in C + + common sense

The process of preprocessing (#include, #if, #define), compiling, assembling, and linking is the process of the C + + from editing to generating the target file, and macro substitution is occurring in preprocessing, and the macro substitution does

Linux Source Analysis byte order (4)--Little_endian.h

This section focuses on the small-endian byte order.First, we want to look back at the concept of the big, small end mentioned in the previous section:Byte order refers to the order in memory of data that occupies more than one byte of memory,

Use of LayerMultiplex in Cocos2d-x

Use of LayerMultiplex in Cocos2d-x1. Usage It is used to manage Layer switching without switching scenarios. 2. Code 1). h file #include "cocos2d.h"#include "ui/CocosGUI.h"#include "VisibleRect.h"USING_NS_CC;using namespace ui;class

Introduction to cocos2dx (15) Anti-exception programming mode

~~~~ My life, my little bit by bit !! Anti-exception programming mode. This is what I saw when I browsed other blogs. Here I will give a general description of it. I 'd like to write articles about this aspect on Baidu. In fact, the anti-exception

On the process control and its implementation in the speech of PHP

The script consists of statements, which are implemented by Process control, and this section mainly describes the use of several keywords. ElseIf elseifAnd else if The behavior is exactly the same, if you use a colon to define the if/elseif

_ File __,__ line __, function _ implement code tracking and debugging (C Programming in Linux)

Let's take a look at the simple initial code: Pay attention to the compiled and running results. Root @ xuanfei-desktop :~ /Cpropram/2 # Cat global. h // header file# Ifndef clobal_h# Define global_h# Include Int funca (void );Int funcb (void );#

File __,__ line __, function _ implements code tracking

Root @ xuanfei-desktop :~ /Cpropram/2 # Cat global. h // header file# Ifndef clobal_h# Define global_h# Include Int funca (void );Int funcb (void );# EndifRoot @ xuanfei-desktop :~ /Cpropram/2 # Cat funca. C // function# Include "Global. H"Int funca

Python Programming (three operating modes of Python development) "Go"

Transferred from: http://blog.csdn.net/feixiaoxing/article/details/53980886Copyright Notice: This article for Bo Master original article, without Bo Master permission not reproduced. Catalog (?) [-] Single cycle mode multithreaded mode reactor mode "

Linux obtains IP and NIC information for the machine

Linux obtains IP and NIC information for the machineThe code comes from the network, I rewrite, have the United States dare not self-specialized, special share. The method is very easy to use, with 3 functions.Header file Getmac.h:/** * getmac.h * *

Kernel preemption under Linux

2017-03-03Unfortunately before the introduction of the process scheduling article, although involved in the kernel preemption, but not in-depth introduction to it, today a little summary of the kernel preemption.Kernel preemption reduces the latency

Typical usage and error points of FUNCTION macro definition

1. The function body can directly use a macro to define the left and right values of the operation, no matter whether there is any returned value. See: Error message:  2. Enclose the function body with parentheses () and use macro definitions to

Assertion of the little secrets in C Language

Every time I write a summary, I think it is a headache, because I know that the summary is really important, and it almost directly determines the number of readers. It may take a lot of effort to write things, because the failure of the abstract

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